AEM’s remote transmit selector provides pilots with convenient toggling of TX Select to the desired communication radio without releasing flight controls. Our RTS01 also acts as an expansion panel and RX Activity indicator, increasing the capability and capacity of the ‘host’ aircraft audio system.
https://www.aem-corp.com/audio/remote-transmit-selectors
https://www.aem-corp.com/audio/remote-transmit-selectors